mbox series

[v1,-next,0/3] RISC-V: ACPI: Enable CPPC based cpufreq support

Message ID 20240208034414.22579-1-sunilvl@ventanamicro.com
Headers
Series RISC-V: ACPI: Enable CPPC based cpufreq support |

Message

Sunil V L Feb. 8, 2024, 3:44 a.m. UTC 
  This series enables the support for "Collaborative Processor Performance
Control (CPPC) on ACPI based RISC-V platforms. It depends on the
encoding of CPPC registers as defined in RISC-V FFH spec [2].

CPPC is described in the ACPI spec [1]. RISC-V FFH spec required to
enable this, is available at [2].

[1] - https://uefi.org/specs/ACPI/6.5/08_Processor_Configuration_and_Control.html#collaborative-processor-performance-control
[2] - https://github.com/riscv-non-isa/riscv-acpi-ffh/releases/download/v1.0.0/riscv-ffh.pdf

The series is based on the LPI support series.
Based-on: 20240118062930.245937-1-sunilvl@ventanamicro.com
(https://lore.kernel.org/lkml/20240118062930.245937-1-sunilvl@ventanamicro.com/)

Sunil V L (3):
  ACPI: RISC-V: Add CPPC driver
  cpufreq: Move CPPC configs to common Kconfig and add RISC-V
  RISC-V: defconfig: Enable CONFIG_ACPI_CPPC_CPUFREQ

 arch/riscv/configs/defconfig |   1 +
 drivers/acpi/riscv/Makefile  |   1 +
 drivers/acpi/riscv/cppc.c    | 157 +++++++++++++++++++++++++++++++++++
 drivers/cpufreq/Kconfig      |  29 +++++++
 drivers/cpufreq/Kconfig.arm  |  26 ------
 5 files changed, 188 insertions(+), 26 deletions(-)
 create mode 100644 drivers/acpi/riscv/cppc.c

Comments

Rafael J. Wysocki Feb. 12, 2024, 3:24 p.m. UTC | #1 
On Thu, Feb 8, 2024 at 4:44 AM Sunil V L <sunilvl@ventanamicro.com> wrote:
>
> This series enables the support for "Collaborative Processor Performance
> Control (CPPC) on ACPI based RISC-V platforms. It depends on the
> encoding of CPPC registers as defined in RISC-V FFH spec [2].
>
> CPPC is described in the ACPI spec [1]. RISC-V FFH spec required to
> enable this, is available at [2].
>
> [1] - https://uefi.org/specs/ACPI/6.5/08_Processor_Configuration_and_Control.html#collaborative-processor-performance-control
> [2] - https://github.com/riscv-non-isa/riscv-acpi-ffh/releases/download/v1.0.0/riscv-ffh.pdf
>
> The series is based on the LPI support series.
> Based-on: 20240118062930.245937-1-sunilvl@ventanamicro.com
> (https://lore.kernel.org/lkml/20240118062930.245937-1-sunilvl@ventanamicro.com/)
>
> Sunil V L (3):
>   ACPI: RISC-V: Add CPPC driver
>   cpufreq: Move CPPC configs to common Kconfig and add RISC-V
>   RISC-V: defconfig: Enable CONFIG_ACPI_CPPC_CPUFREQ
>
>  arch/riscv/configs/defconfig |   1 +
>  drivers/acpi/riscv/Makefile  |   1 +
>  drivers/acpi/riscv/cppc.c    | 157 +++++++++++++++++++++++++++++++++++
>  drivers/cpufreq/Kconfig      |  29 +++++++
>  drivers/cpufreq/Kconfig.arm  |  26 ------
>  5 files changed, 188 insertions(+), 26 deletions(-)
>  create mode 100644 drivers/acpi/riscv/cppc.c
>
> --

This is fine with me, so

Acked-by: Rafael J. Wysocki <rafael@kernel.org>

and it would be good to ask Viresh (who maintains the CPPC cpufreq
driver) for an ACK.

Thanks!
Viresh Kumar Feb. 13, 2024, 6:15 a.m. UTC | #2 
On 12-02-24, 16:24, Rafael J. Wysocki wrote:
> On Thu, Feb 8, 2024 at 4:44 AM Sunil V L <sunilvl@ventanamicro.com> wrote:
> >
> > This series enables the support for "Collaborative Processor Performance
> > Control (CPPC) on ACPI based RISC-V platforms. It depends on the
> > encoding of CPPC registers as defined in RISC-V FFH spec [2].
> >
> > CPPC is described in the ACPI spec [1]. RISC-V FFH spec required to
> > enable this, is available at [2].
> >
> > [1] - https://uefi.org/specs/ACPI/6.5/08_Processor_Configuration_and_Control.html#collaborative-processor-performance-control
> > [2] - https://github.com/riscv-non-isa/riscv-acpi-ffh/releases/download/v1.0.0/riscv-ffh.pdf
> >
> > The series is based on the LPI support series.
> > Based-on: 20240118062930.245937-1-sunilvl@ventanamicro.com
> > (https://lore.kernel.org/lkml/20240118062930.245937-1-sunilvl@ventanamicro.com/)
> >
> > Sunil V L (3):
> >   ACPI: RISC-V: Add CPPC driver
> >   cpufreq: Move CPPC configs to common Kconfig and add RISC-V
> >   RISC-V: defconfig: Enable CONFIG_ACPI_CPPC_CPUFREQ
> >
> >  arch/riscv/configs/defconfig |   1 +
> >  drivers/acpi/riscv/Makefile  |   1 +
> >  drivers/acpi/riscv/cppc.c    | 157 +++++++++++++++++++++++++++++++++++
> >  drivers/cpufreq/Kconfig      |  29 +++++++
> >  drivers/cpufreq/Kconfig.arm  |  26 ------
> >  5 files changed, 188 insertions(+), 26 deletions(-)
> >  create mode 100644 drivers/acpi/riscv/cppc.c
> >
> > --
> 
> This is fine with me, so
> 
> Acked-by: Rafael J. Wysocki <rafael@kernel.org>
> 
> and it would be good to ask Viresh (who maintains the CPPC cpufreq
> driver) for an ACK.

I have provided my Ack over the cpufreq patch. Thanks.